Hammer Brass & Nylon 4oz This dual headed hammer features interchangeable faces, one nylon and one brass. Use the brass head for lighter weight work where steel headed hammers are too aggressive. Use the nylon head on delicate projects or to avoid potential marring or scratching problems. Length: 8-1/2" Weight: 4oz Head size: 2-1/2" x 1/2" Why do I need this item? This hammer is great for lighter weight projects or when working with softer metals such as copper.